公路建设项目的经济评价，当（），项目可行。

A、财务评价不可行，国民经济评价不可行

B、财务评价可行，国民经济评价不可行

C、财务评价不可行，国民经济评价可行

D、财务评价可行，国民经济评价可行

To a router, a flow is a (1) of packets that share the same Characterstics, such as traveling the same (2) ,using the same (3) ,having the same kind of security, and so on. A router that supports the handling of flow labels has a (4) table. The table has an entry for each active flow label; each entry defines the (5) required by the corresponding flow label.

1（）

A．sequence

B．stream

C．Queues

D．flow